Work-support.



J. F. DAVEY.

WORK SUPPORT.

APPLIOATION FILED JAN. 2. 1909.

WMDs/75H.

Patented Apr. 16, 1912.

2 SHEETS-SHEET v1,

1 ndi: W 5ms..

J. F. DAVBY.

WORK SUPPORT.

APPLICATION FILED JAN. 2. 1909.

Patented Apr. 16, 1912.

2 SHEETS-SHEET 2.

J5@ Wwf/m75.

' 'MG- M-ff $7* E STATES PATENT @FETCH JOHN F. DAVEY, BEVERLY,MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON,NEW JERSEY, A CORPORATION OF NEW JERSEY.

WORK-SUPPORT.

To all whom it may concer/nf:

Be it known that I, JOHN F. DAvnY, a citizen of the United States,residing at Beverly, in the county of Essex and State of Massachusetts,have invented certain Improvements in /Vork-Supports, of which thefollowing description, in connection with the accompanying drawings, isa specification, like reference characters on the drawings indicatinglike parts in the several figures.

This invention relates to machines for inserting fastenings, andparticularly to mechanisms for operating the work supports in suchmachines.

As herein illustrated the invention is shown as embodied in a fasteninginserting machine of the type disclosed in United States Letters Patentto J. F. Davey and S. W. Ladd, No. 581,066, granted April 20, 1897, forimprovements in pegging machines, but it will be understood that many,if not all, of the features of this invention are applicable tofastening inserting machines of other types.

In the machine illustrated in the Letters Patent above referred to, ithas been found desirable to f peg against a spring, as it is called;that is, to support t-he work for the pegging operation upon a worksupport which is pressed up under strong spring pressure to clamp thework against the work abutment. In this machine, as in many fasteningmachines of other types, a hole is formed in the work to receive the pegbefore it is driven, this hole being formed usually by an awl whichafterward feeds the work over the work support to bring the awl holeinto peg-receiving alinement with the peg driving mechanism. i

In order that the awl may readily feed the work in a machine in whichthe work support clamps the work normally against the work abutmentunder the action of a strong spring, it is preferable that the workSpecification of Letters Patent.

Application filed January 2, 1909.

Patented Apr. 16, 1912.

serial No. 470,472.

To insure a quick return of the work support to its work clampingposition after the work feeding operation, it is desirable that thisreturn be effected through the action of the spring upon the worksupport and, therefore, the work support is preferably lowered againstthe action of its spring by mechanism which releases it at the propertime to permit its being restored to work clamping position at the endof the work feeding operation;

An object of the present invention is to provide in a machine which runsat comparatively high speed, a work support lowering or releasingmechanism which will insure a positive lowering of the work supportagainst its spring to release the work at the proper time during thework feeding operation.

Another object of the invention is to provide means which not only willinsure the positive release of the work at the proper time in the cycleof operations of the machine, but which will operate in such timedrelation to the other parts that it will permit the work support to berestored again to its work clamping position in time to permit thehereinbeforementioned pegging against the spring.

One of the diiiiculties met with heretofore in providing a work supportreleasing mechanisin which operates to depress'the work support againstthe action of its spring is to provide means for clutching the worksupport, or some part connected therewith, which acts positively enoughto insure the depression of the work support against its spring atcomparatively high speeds of operation and which can at the same time beunclutched quickly enough to permit the work support to be returnedintoA clamping position as the work feeding operation ceases.

A further object of the present invention, therefore, is to providevwork support releasing or depressing mechanism which combines theabove-mentioned positive clutching feature with the above-mentionedsensitive unclutching feature.

A particular object of the present invention is to provide work supportreleasing or depressing mechanism which may readily be operated fromother parts of the machine and which may therefore be convenientlyembodied in'machines already in com- Vimparted to said lever.

inercial use, part-icularly in machines of the type disclosed in theabove-mentioned Letters Patent.

Other objects of the invention are the provision of novel means forapplying strong spring pressure to the work support as it is moved fromwork receiving position into operative work supporting position,

said means being preferably under the con-` trol of the operator and soarranged that,

when the treadle or other manually oper-- ated means is released, thestrong spring pressure is automatically removed from the work supportand the work support is freel to fall of its own weight into its workreceiving position, t-he shock of this fall being preferablytaken up bya cushioning spring;

the provision of means for cushioning the` unclutching movement of thework support depressing mechanism; the provision of means for preventinga depression of the work support beyond a predetermined amount butinsuring a uniform release of the work without regard to its thickness,and the provision of means for multiplying the movements of the part ofthe commercial machine liereinbefore referred to from:

which the work support depressing mechanism is operated.

With the foregoing and other objects in view, the invention is hereinshown Vas embodied in a construction comprising a clutch by which anormally operating lever may be clutched to a shaft geared to the worksupport and automatically unclutched therefrom after a predetermineddepressing movement has been imparted to said work support, the clutchin the preferred embodie ment of the invention being constituted bycooperating members one of which is rigidly attached to the Work supportoperating shaft and the other of which is carried by a lever looselypivoted upon said shaft.

In one embodiment of the invention the clutch member carried by the worksupport operating shaft comprises a friction disk having a V-sliapedperiphery and the clutch member carried by the lever pivoted upon saidshaft comprises a shoe shaped to fit upon said periphery. The leverwhich is Y means for imparting the'work support de pressing movement tosaid lever is arranged to release the lever after it has imparted apredetermined amountV of movement there47 to, whereby the lever is freeto return to its initial position under the action of gravity, thismovement being accelerated somewhat in the preferred construction by theaction of the work clamping spring upon the Work support and through itupon the work support operating shaft, and by the action of anunclutching spring upon the means through which the brake shoe isapplied to the clutching disk. The brake shoe will be moved out ofclutching relation to the friction disk as the lever is returned to itsinitial position and thus the lever will not retard the upward movementof the work support in case athinner portion of the work has been fedover it, but the work support will be free to move quickly into workclamping position under the action of its spring.

l/Vhen the machineis to be used with very heavy work on which theclamping action of a very strong spring is desired, it is preferable tosubstitute for the friction clutch members, in the embodiment justdescribed, interlocking clutch members, and another illustratedembodiment of the invention is a construction in which suoliinterlocking clutch members are provided.

The spring hereinbefore referred to, through which the work clampingaction of t-he work support is effected, is preferably so mounted thatits tension may be varied, and an important feature of the presentinvention is the provision of novel means for supporting thejust-mentioned spring together with novel means for eecting a -tensionadjustment of said spring.

In the illustrated construction, the spring which operates through thework support to clamp the work during the fastening inserting operationis carried in a cage supported upon, or formed integral with, one end ofa lever, pivoted preferably in the base of the machine, thespring-supporting cage containing a plunger bearing upon one end of thespring by which the spring may be compressed. The other end of thecage-carrying leverl bears against the under side of a rod connected tothe work support and through which the work support may be raised intowork clamping position.

Means is provided byv which the cagecarrying lever may be turned aboutits fulcrum. to raise the work support into work i clamping position,the said means operating upon the plunger' in the spring cage andthereby eecting through the spring in said cage a yielding work clampingaction of the work support.

In the construction herein shown, the means for turning thecage-carrying lever about its fulcrum to effect a work clamping actionof the work support comprises a second lever turning about the samecenter as the cage-carrying lever, having one arm eX- tending intoengagement with the upper end of the plunger in the spring-carrying cageand having its other arm shaped to form a cam by which rotary motion maybe imparted to said lever through a cam roll mounted upon a treadlearranged to be depressed by the foot of the operator. Preferably thetreadle through which the work support raising movement of thecage-carrying lever is effected is connected to means by which thefastening inserting mechanism may be set in operation as the worksupport comes into work clamping position. As herein shown, the meansconnected to the treadle for setting the fastening inserting mechanismin operation comprises ay clutch actuating rod having a lost motionconnection with said treadle, whereby the treadle operates first tobring strong spring pressure to bear on the work support and upon thework before the fastening inserting mechanism is actuated to insertfastenings, and an important feature of the present invention is theprovision of means whereby, through a single treadle, strong s'pringpressure may be brought to bear upon the wo-rk to effect a clampingthereof, and, after the work has been clamped, the fastening insertingmechanism may be set 'in operation to insert fastenings.

In the accompanying dravvings,-l `igiire 1 is a side elevation partly insection of the machine disclosed in the above-identified Letters Patent,having this invention applied thereto; Fig. 2 is a sectional view on alarger scale of the base of the vmachine shown in Fig 1; Fig. 3 is adetail front eleration of the mechanism shown in Fig. 2; Fig. 4 is aperspective view of one form of clutch embodied in the work supportdepressing mechanism of this invention; Fig. 5 is a detail section ofthe clutch shown in Fig. 4; Fig. 6 is a perspective view of a modifiedform of the clutch shown in Figs. 4 and 5. Fig. 7 is a perspective viewof still another modification of the clutch shown in Fig. 4.

In the machine of the above identified Letters Patent a suitable base orstandard 2 supports a head 4 in which is carried the mechanism forforming and driving pegs together with the actuating cam for the pegcutting device which cuts the ends of the pegs project-ing through thesole of the shoe. The main shaft of the machine is arranged to beclutched to a driving pulley 6 by any suitable clutch mechanism actuatedthrough a clutch actuating rod 8 connected to a t-readle 10 in the baseof the machine. The cam 12, hereinbefore referred to, which actuates thepeg cutting device in the work support, is connected to said peg cuttingdevice through suitable Y connections comprising an angle -lever 14, a

rod 16, a second angle lever 18, a bifurcated link 20, actuators 22, andcutter actuating rod 24, these connect-ions being preferablysubstantially the same as those described in the co-pending application,Ser. No. 222,- 022, ofvLouis A. Casgrain, for improvements in machinesfor inserting fastenings.

The angle lever 18 is oscillated at every rotation of the main shaft ofthe machine and the oscillation of this lever is utilized in' thepresent construction to operate the work support depressing mechanism.The work support in the present construction comprises a horn 26 whichcontains the peg cutting device. The horn 26 is supported to rotatefreely and to be movable longitudinally in a split bearing sleeve 29. Aspring 30 bearing at its lower end on a verically adjustable foot piece31 carried by the machine frame engages at its upper end a shoulder, notshown, inside the horn shank 32 and partially counterbalances the hornand its connected parts.

The foot piece 31 is preferably so adjusted as to cause the horn to bebalanced in depressed position so that the operator is not required todepress the horn manually in order to remove the work. At its lower endthe horn shank 32 is threaded to be engaged by an adjustable collar 33which has a flange 34 at its Lipper end and is externally threaded atits lower end to receive a split lock ring 35. A ring 36 surrounding thecollar 33 is provided at its inner periphery with a channel to receivethe flange 34. A cushioning device, such as a felt washer w, is locatedbetween the ring '36 and the stationary sleeve 29. As shown, anantifriction device 37 is interposed between the rings 35 and 36.

The horn slide or actuating yoke 38 reciprocates in guides 39 formed onthe ma-v chine frame. The slide is bolted at its upper end todiametrically opposed ears 42 on the ring 36 and at its lower endterminates in arod 43 which passes freely through the treadle 10. Bythis construction the horn is forced to partake of the longitudinalmovement of its actuating yoke or slide, but is freely rotatablerelatively thereto. The specic connections described between the horn 26and the horn slide 38 form no part of the present invention, theillustrated connections being substantially the same as those shown inthe co-pending application, Serial No. 222,022 above referred to.

Bolted to the under side of the machine frame is a bracket 45. Pivotedupon this bracket is a lever 46 carrying at one end a spring containingcage 47 comprising a cylindrical body portion and a cap 48 screwed intoone end of the body portion. A spring 49 bears at one end against saidycap and at its other end against the head 50 of a plunger 51 slidablethrough an opening in the cap 48. The tension of the spring 49 may bevaried lll() by screwing the cap 48 in or out with respect to the bodyportion of the cage. The body portion of the cage 47 is open at its endremote from the cap and is inwardly.

flanged at this end to limit the outward movement of the plunger 51. Theother end of the lever 46 extends beneath the rod 43 in which the lowerend of the horn slide terminates and lifts the slide and horn when it ismoved upwardly about its pivot. A second lever 52 mounted to turnconcentrically with the lever 46 has o-ne end extending into engagementwith the upper end of the plunger 51 and its other end shaped to form acam 53 by which it may be turned about its pivot to cause its plungerengaging end to press upon the plunger, this movement about the pivotbeing effected by the engagement of a cam roll 54 upon the treadle lever10 with the said cam 53. lWhen the treadle lever 10 is depressed the camroll 54 will travel down the cam 53 and cause the lever 52 to turn aboutits pivot, the first movement of the lever 52 about its pivot actingthrough the plunger 51 and strong spring 49 toturn the lever 46 alsoabout its pivot and bring its forward end into engagement with the rod43 provided it is not already in engagement therewith. Continueddepression of the treadle lever 10 will cause the horn to be raisedthrough the connections just described until it clamps the work againstthe usual work abut-ment surrounding the peg driving opening andfurthe-r movement of the treadle will then serve to compress the spring49 somewhat and cause the work to be clamped under the yielding pressureof the said spring Preferably the same movement of the treadle whichserves to bring the work support into work clamping relation to the workoperates through suitable connections to actuate the clutch by which thefastening inserting mechanism is clutched to the constantly drivenpulley hereinbefore mentioned. The illustrated connections comprise theclutch actuating rod 8 above mentioned and a roller 56 traveling in aslot 58 in a block attached to the lower end of the rod 8. When thetreadle lever 10 is in its inoperative position the roller 56 is in theupper end of the slot 58. The first part of the downward movement of thetreadle lever therefore has no effect upon the clutch actuating rod 8.After the treadle lever has moved far enough in its downward movement toraise the work support into work clamping relation to the work, thefurther movement of the treadle lever by which it brings the yieldingpressure of the spring 49 to bear upon the work in its clamped positionserves to pull down the clutch actuating rod 8 and to start themechanism for inserting fastenings.

' It will be seen from the foregoing description that the work isnormally clamped against the work abutment during the fasteninginserting operation under the action of the spring 49 which ispreferably strong enough to absorb the impact incident to the pegdriving operation. In other words, the pegging in this machine ispreferably done against a spring. As hereinbefore mentioned, an awl isprovided which forms a peg receiving opening in the work in advance ofthe peg driving ope-ration, and this awl is utilized in the illustratedconstruction to feed the work into position to bring the peg receivingopening beneath the peg driving mechanism.

In order that the work feeding operation of the awl may not be impeded,mechanism is provided which operates to depress the work support againstthe action of the spring 49 after each fastening inserting operation andduring each work feeding operation. The illustrated mechanism comprisesa shaft 60 mounted in bearings in the machine frame, said shaft havingformed upon it two pinions 62 which engage teeth formed upon the two'sides of the yoke 38. Loosely mounted upon the shaft 60 is a forkedlever 64 and rigid with the shaft 60 and lying between the fork membersof said lever 64 is a clutch disk 66`which, in the embodiment of theinvention illustrated in Fig. 4, is a friction disk. n

The lever 64 is arranged to be clutched to the shaft 60 to turntherewith by means of a clutch shoe 68 which engages the clutch disk 66upon said shaft. Means is provided forl moving the clutch shoe 68 intoclutching engagement with the clutch disk 66 and the illustrated meanscomprises a crank arm 7 0 having a stem 72 mounted to turn in one of thefork members of the lever 64, said stem having a cut-away portion lyingwithin a rectangular recess formed in the back of the shoe 68. As shownin Fig. 5 the face of the cut-away portion of the stem 72 which bearsnormally against the back side of the shoe 68 in the rectangular recessin said shoe lies upon the forward side o-f the axis of said stem sothat rotation of the stem about its axis tends to force the shoe 68 intoclutching engagement with the disk 66. Preferably the means for movingthe clutch shoe 68 into clutching engagement with the clutch disk 66 isarranged to be operated through the means by which work supportdepressing Vmovement is imparted to the lever 64, and in the illustratedconstruction the said work support depressing movement is imparted tothe lever 64 through the clutch actuating crank arm 70.

As hereinbefore suggested, the movement of the angle lever 18 isutilized in operating the work support depressing mechanism, but thismovement in machines in commercial use is not sufficient to impart thedesired movement to the said depressing mechanism, and means istherefore preferably provided for multiplying the movements of the lever18. The illustrated means comprises a second angle lever 74 pivoted inthe machine frame and connected by a pin and slot connection to theangle lever 18. .Mounted in the upper part of the angle lever 74 is aspring-pressed sliding bolt 76 having a flattened port-ion at itsforward end arranged to engage normally the under side of the crank arm70. As the angle lever 74 is rocked by its connections with the anglelever 18, it operates to lift the rear end of the crank arm by theengagement of the forward end of the bolt 76 with its under side, thefirst part of the upward movement of the rear end of the arm 70 with thebolt 76 serving to turn the stem 72 and to bring the clutch shoe 68 intoclutching engagement with the clutch disk 66. This movement of theclutch shoe into clutching engagement with the disk 66 locks the shaft60 and lever 64 together and also prevents furtlier'tur'ning of the stem72. Continued upward movement of the bolt 76 will thus serve to lift therear end of the lever 64 and to turn the shaft 60 which through it-sconnections with the yoke 38 effects a depression of the work supportagainst the action of the spring 49. The forward end of the bolt 76 doesnot project far under the crank arm 70 and therefore when the anglelever 74 has turned through a certain angle of rotation the bolt 76slips out from beneath the arm 70 and the lever 64 is thus permitted toreturn to its initial posit-ion. The return movement of the lever 64 iscushioned by a spring buffer 78 which strikes a projection 8O upon theframe. A spring-pressed plunger 82 bearing normally upon the uppersideof the arm 70 has a double function. When the lever 64 returns to itsinitial position, after being raised through the connectionshereinbefo-re described to effect a depression of the work support, theplunger 82 bearing upon the upper side of the crank arm 7 O serves torock the stem 72 about its axis and thus to release the clutch shoe 68from the clutch disk 66. When the angle lever 74 rocks in a direction tolift the lever 64 through the connections hereinbefore described, theplunger 82 which bears upon the upper side of the crank arm 70 at apoint between the axis of the stem 72 and the point of engagement of thebolt 76 with said arm serves to retard the upward movement of the lever64 somewhat, forming a fulcrum about which arm 70 turns as a lever ofthe first class, thereby turning the stem 72 suiiiciently to effect amovement of the clutch shoe 68 into clutching engagement with the clutchdisk 66. This is an important novel feature of the invention.

In the embodiment of the invention shown in Fig. 6, which is intendedfor use with very heavy work when the spring 49 is adjusted to eXert avery strong spring pressure upon the work support, the clutch disk 66and the clutch shoe 68 are provided with interlocking teeth whereby amore positive clutching action is obtained. In this construction, a mereoscillation of the stem 72 into its unclutching position will notusually serve to bring the clutch shoe 68 out of clutching relation tothe clutch disk 66 and .springs 84 are therefore provided, one upon eachside of the. stem 72, which are connected at one end to the clutch shoe68 and at the other end to the machine frame, for withdrawing the clutchshoe when the stem 72 is moved into its unclutching posit-ion.

In Fig. 7 is illustrated still another embodiment of the invention bywhich a positive clutching action is obtained, and, in this embodiment,the clutch disk 66 is formed with teeth as in the construction shown'inFig. 6, and for the shoe 68 is substitute-d a pawl 90 rigidly attachedto the stem 72.

A detailed description of the operation of the embodiments of theinvention illustrated in Figs. 6 and 7 is believed to be unnecessary inaddition to the description of the embodiment shown in Figs. 1 to 5inclusive.

In some of the appended claims that part of the construction hereinillustrated and described which comprisesthe spring-pressed bolt 76 isreferred to as a latch. The term latch as used in these claims isunderstood to mean a part which yields to pass a coperating stop whenmoving in one direction past said stop, whereby it may spring or dropinto operative position behind said stop.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is 1. In a machine of the classdescribed, the combination with a work support, of operating mechanismtherefor comprising a shaft intergeared at its ends with said support, alever arranged to oscillate about said shaft between its ends, means foroscillating said lever, and meansv for clutching said lever to andunclutching it from said described, the

the work, of mechanism for intermittently depressing said work supportcomprising a shaft operatively connected at each of its ends with saidsupport, a lever pivoted upon said shaft between the points ofconnection of said shaft with said work support and arranged to beclutched to said shaft, means for effecting the clutching of said leverto said shaft, and means for operating said lever including means foroperating said clutching means.

t. In a machine of the class described, the combination with aworksupport, of operating mechanism therefor comprising a shaftintergeared with said support, a lever arranged to Voscillate about saidshaft, a clutch comprising a disk rigidly attached to said shaft and ashoe carried by said lever, means for pressing said shoe into clutchingrelation to said disk comprising a crank arm and a yielding fulcrumindependent of said shoe about which said crank arm turns as a lever ofthe first class when operating saidV clutch.

5. A machine of the class described having, in combination, a worksupport yieldingly held normally in work clamping rela- `V tion to thework, means for intermittently depressing said work support comprising ashaft lntergeared therewith, means for 1n- 'termittently oscillatingsaid shaft compris- Asaid work support against thc action of said springand then releasing it to permit said spring to restore it to workclamping position comprising a latch arranged to be released at the endof the work support depressing movement of said means and a clutchoperated and released by said latch.

7 A machine of the class described having, in combination, a worksupport, a spring acting to press said work support normally intoclamping relation to the work, means for intermittently depressing thework support against the action of its spring comprising a lever andconnections between said lever and said support including a clutch, andmeans for moving said lever in the direction to effect a depression ofsaid work support, said last-named means being arranged to release saidlever after it hasa lever, a compressible spring confined upon,

one arm of said lever, the other arm of said lever being operativelyassociated with the work support, and means for compressing said springcomprising a second lever arranged to turn about the same center as thefirst mentioned lever.

9. In a machine of the class described a work support, means forbringing to bear upon the work support the work clamping pressure of astrong spring comprising a lever, a compressible spring confined uponone arm of said lever, the other arm of said lever being operativelyassociated with the work support, and means fo-r compressing said springcomprising a second lever arranged to turn about the same center as thefirst mentioned lever, and means operating upon one arm of said lastmentioned lever to cause the other arm to compress the spring.

10. A machine of the class described, having in combination, mechanismfor operating upon the work, a work support, means for starting andstopping said mechanism comprising a treadle, means controlled by thetreadle for bringing to bear upon the work support the work clampingpressure of a strong spring comprising two concentrically pivotedlevers, a compressible spring coniined upon one arm of one of saidlevers, the other arm of said. lever being operatively associated withthe work support, and means for causing one arm of the other lever tocompress the spring comprising a cam roll upon the treadle arranged toengage a cam upon the other arm of said lever.

11. A machine of the class described having, in combination, a worksupport, a spring acting normally to press said work support intoclamping relation to the work, automatically actuated .means forintermittently depressing said work support against the action of saidspring, constructed to be disconnected both from its actuating means andfrom said work support at the end of the ydepressing movement to permitsaid spring to raise the work support again into work clamping position,and means for cushioning the return movement of said aforementionedmeans.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN F. DAVEY. y Witnesses:

H. DoRsEY SPENCER, ARTHUR L. RUSSELL.

:(''pies'l of tlimf'patentmay bebbta'inedffor vc centsV each; by'a'ddressng the Commissionerv of- Patents,

Washington, D. G.

